Rasa connection (with Docker) with socketio for my own website

Hello everyone, I am new to this and I set up rasa x with Docker containers and I am trying to connect it to my page through socket.io, following the tutorial of rasa massterclass, however I cannot get the connection satisfactory, I have this environment in a virtual machine ubuntu while organizing resources on my server.

Could someone help me and tell me if I really make the connection this way? I modified my credentials.yml file with the following:

socketio: user_message_evt: user_uttered bot_message_evt: bot_uttered session_persistence: true / false

and I get this error: Requested URL /socket.io not founds